and vice versa without any interruption. Opportunistic offloading With the increasing availability of inter-device networks (e.g. Bluetooth or WifiDirect) there is also the possibility of offloading delay tolerant data to the ad hoc network layer. In this case, the delay tolerant data is sent to only a subset of data receivers via the 3G network, with the rest forwarded between devices in the ad hoc'' layer in a multi-hop fashion. As a result, the traffic on the cellular network is reduced, or gets shifted to inter-device networks. See also LTE in unlicensed spectrum Generic Access Network References External links Global Wi-Fi Offload Summit Metropolitan area networks Network access Wi-Fi